Punch retainer



WITNESSES Ot. 30, 1934. Q B WALLMAN 1,979,059

PUNCH RETAINER Filed Jan. 50. 1953 JIVVE'NTQE" Patented oet. so, 1934 e 1,979,059

UNITED STATES PATENT oFFlcE Application January 30, 1933,` Serial No. 654,274

3 Claims. (Cl. 279-777) The invention relates to improvements in which L shaped release pin 5 can be put in place. punch locking device for quick release punch re- Release pin hole 13 is enlarged at end opposite tainers 4which allows the removal of punches pocket 11 to provide a pocket 14 for spring 6. which have been dulled or broken, and the ob- Locking block 3 is a sliding lit in locking block x5 jects of the improvements are; pocket 11 and has locking block hole 16, which 55 First, it affords the absolute control of all parts locking block hole 16 is a slip lit for the short of the said locking device, that is, there are no leg of the L shaped release pin 5, said release loose or oating details which interfere with the pin 5 controlling the movement of the locking removal or insertion of the punch, block 3. Locking block 3 is made irregular in Second, it affords facilities for the operator to outline, so that a rotating motion of the locking 35 make the change of punches without the aid of block 3 is obtained by reason of the reciprocating any tools or equipment, and motion of the release pin 5 and locking blocks Third, it enables the diemaker in aligning the relative position to guide 4. A spring 6 iS plaoed punch and die following construction to manip- 0n release pin 5 and in Spring pooket 14 and re- '115 ulate the punches so as to inspect them in relatained by means of a release button 7 which is 79 tion to holes in the die without the removal of the rivetted on to release pin 5. A backing plate 2 locking device. is inserted between the punch pad 1 and the These and other objects will become apparent punoh holder 9 of Whioh punch holder 9 a fragin the description below, in which characters of ment is shown. 912,0, reference refer to like named parts in the draw- Referring to Figure 1 in Whioh punch 8 is locked 75 ing rigidly by means of locking block 3, locking block one form of the invention is illustrated in the 3 is brought into position by force of spring 6 accompanying drawing in which Figure ldisplays being released and Controlled by guide in the the device in a locked position for holding the form of an inner Stop or thrust member 4.

(2.5 punch. The cross sections are or detail l through Pressure is exerted on the punch 8 in an upwardy 80 the line A A and detail 7 through the line B B direction against backing plate 2 when said lockof Figure 2. ing block 3 is forced into space between the angu- Figure 2 is a plan or top View of punch pad 1, lar bottom of the locking block pocket 11 and punch e, and entire locking device, ln which the the upper side of slot 1'? in punch 8. The angu- V130 locking device is shown in a released position. lar bottoni of looking block pocket 11 and the 85 Figure 3 is a, View Similar to Figure 1 with upper side of punch slot 17 not being parallel but same cross sections omitting punch holder 9 and the puneh slot 17 opening aWay from the angular backing plate 2, in which is shown the locking debottom of looking block pocket 11 forming a vice in released position with punch 8 partially tapered opening in Whioh looking block 3 acts removed. as a Wedge. Referring to Figure 3 in which is 90 Figure 4 is same view as Figure 3 with punch shown the locking device in released position, the 8 entirely removed and locking device in a relooking bleek 3 is moved upward by means of tarded position, which is position of locking depressure exerted on the release button 7 and the vice when diemaker is making inspection of alignsaid locking block 3 being moved out of the path '40 ment of punches with die following construction of the puneh 8 by the guide 4. This block 3 95 of punchl and die. cannot be moved upward by pressure on the outer Block 1 known as punch pad has punch hole 10 end thereof of the punch 8, as the inner end of perpendicularly through its thickness for receivthe block engages the thrust member or guide ing the punch 8, said punch 8 being slotted to 4 which prevents such pressure being transmitted receive locking block 3. A locking block pocket to the pin 5 in the hole 16. 100 11 is out in pad 1 at right angles to hole 10 with Referring to Figure 4 it shows the locking block bottom at an angle to side of hole 10 and open- 3 in a retarded position. This is the position in ing up ini-,0 punch hole 10, Pad 1 has another hole which the device iS placed When assembled With 12 at an angle in the angular bottom of pocket tl 1 e punoh and Clie- It is released by pressure 15,0 11 in which is placed guide 4. The release pin exerted on release pin button 7 by the die maker hole 13 also in pad 1 is parallel to punch hole 10 after the test for alignment of the punches in and parallel to the side of pocket 11 and extends the die. It will be noticed that this position is through pad 1. In pad 1 stock is cut away between accomplished by swinging the locking end of the upper end of release pin hole 13 and locking block locking block 3 away from the punch 8.

55 pocket 11 thus forming release pin slot 15 through I am aware that prior to my invention punch; 11

locking devices have been made with locking mechanisms for the release of punches. I therefore do not claim such a combination broadly; but I claim:

1. In a device of the class described, a pad bored to receive a tool shank, the wall of said bore being recessed, a tool-locking block having vertical and rotary movement in said recess, guide means inclined towards the receiving end of the bore of said pad and engaging one end of said block, further guide means inclined towards the .bore of said pad and engaging one end of said block, a thrust member inclined towards the other end of said bore and engaging the opposite end of said block, and manually operable means for effecting verticalmovement of said block in said recess whereby positive rotation of said block in one or other direction is guided by said guide means and said thrust member.

3. In a device of the class described, a pad bored to receive a tool shank, the wall of said bore being laterally recessed to provide an inclined surface directed towards the receiving end of said bore, a manually operable vertically movable plunger entering said recess, a tool-locking block in said recess fulcrummed intermediate of its length on the inner end of said member, said block being swingable to a position projecting into thebore of said pad in one position of said plunger and swingable to a latched position within said recess in the other position of said plunger, resilient means tending to move said plunger to its rst-mentioned position, and a thrust member engaging the inner end of said block to resist pressure of a tool thereon when said block is in its tool-locking position.

CARL BIRGER WALLMAN.- 

